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Posted to issues@hbase.apache.org by "Rushabh S Shah (JIRA)" <ji...@apache.org> on 2019/04/09 23:45:00 UTC

[jira] [Commented] (HBASE-13682) Compute HDFS locality in parallel.

    [ https://issues.apache.org/jira/browse/HBASE-13682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16813910#comment-16813910 ] 

Rushabh S Shah commented on HBASE-13682:
----------------------------------------

[~eclark]: Is this still an issue ? 
If yes, could you please point me to relevant code section that I can look into. I am new to hbase project and wants to make some impact in hbase project. Thanks in advance.

> Compute HDFS locality in parallel.
> ----------------------------------
>
>                 Key: HBASE-13682
>                 URL: https://issues.apache.org/jira/browse/HBASE-13682
>             Project: HBase
>          Issue Type: Bug
>          Components: Balancer
>            Reporter: Elliott Clark
>            Priority: Major
>
> Right now when the balancer needs to know about region locality it asks the cache in serial. When the cache is empty or expired it goes to the NN.
> On larger clusters with lots of blocks this can be really slow. That means that balancer is un-usable while masters are being restarted.



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